libft/ft_memcmp.c at master · mhjony/libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memcmp.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: jony <jony@student.42.fr>                  +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/10/23 19:17:15 by mhasan            #+#    #+#             */
/*   Updated: 2019/11/04 22:09:38 by jony             ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int ft_memcmp(const void *s1, const void *s2, size_t n)
{
	size_t i;
	unsigned char *ptr1;
	unsigned char *ptr2;

	if (n == 0)
		return (0);
	ptr1 = (unsigned char *)s1;
	ptr2 = (unsigned char *)s2;
	i = 0;
	while (*ptr1 == *ptr2 && ++i < n)
	{
		ptr1++;
		ptr2++;
	}
	return (*ptr1 - *ptr2);
}

int main(void)
{
	char str1[50] = "mahmudul hasan";
	char str2[50] = "mahmudul hapan";
	int n = 14;
	printf("%d", ft_memcmp(str1, str2, n));
	return (0);
}